Automatic positioning and edge pressing device for die and positioning method of automatic positioning and edge pressing device

Abstract

The invention relates to the technical field of die blank pressing, in particular to an automatic die positioning and blank pressing device and a positioning method thereof. The stamping equipment comprises stamping equipment and an upper die fixedly connected with the top of the stamping equipment, a lower die base is fixedly connected to the surface of the stamping equipment, a supporting assembly is arranged on the surface of the stamping equipment, and an edge pressing assembly is rotatably and telescopically arranged in the supporting assembly; the edge pressing assembly is in sliding fit with the guide limiting rail set of the supporting assembly through the limiting assembly. The blank pressing block is kept parallel to the die, taking of the die cannot be affected, when the upper die moves downwards, the linkage rod makes contact with the arc-shaped groove, downward driving force is generated, the blank pressing block is driven to vertically and downwards get close to the die, in the process, the blank pressing block drives the guide wheel to roll along the guide rail, and after the guide wheel reaches the annular guide groove, the die is taken out. And the edge pressing block is driven to rotate and is attached to the surface of the mold, and edge pressing of the mold is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of mold edge pressing, in particular to a mold automatic positioning edge pressing device and a positioning method thereof. Background Art

[0002] Stamping dies are special process equipment used to process materials into parts during cold stamping. Stamping is a pressure processing method that uses a die installed on a press to apply pressure to the material, causing it to separate or plastically deform, thereby obtaining the desired part. In existing mold manufacturing, automotive molds at the edge of the mold core need to be pressed to make the edge of the mold smoother. During the thin plate stamping process, the core function of the press is to prevent the blank from wrinkling, cracking or deflecting during the stamping process, thereby ensuring the forming accuracy and surface quality of the workpiece.

[0003] For example, the Chinese patent with publication number CN222551903U discloses a mold edge pressing structure for automobiles. The hydraulic cylinder drives the hydraulic rod to move downward, thereby driving the upper template to stamp the mold in the mold cavity. After the stamping is completed, the hydraulic telescopic rod drives the support plate to move upward, thereby driving the mold to move upward and move the support plate to a position parallel to the top surface of the lower mold. Then, according to demand, the electric telescopic rods B on the left and right sides first drive the connecting plate to move to the appropriate position toward the mold, and then the electric telescopic rod C drives the edge pressing plate downward to press the left and right sides of the mold, and then the electric telescopic rods C on the front and rear sides drive the edge pressing plate to press the front and rear sides of the mold.

[0004] Considering that the mold is already equipped with multiple drive devices during the injection molding and stamping processes, and the additional hydraulic cylinders and multiple electric telescopic rods added to the edge holding device, the overall number of drive devices has increased significantly, significantly increasing the manufacturing cost and subsequent maintenance cost of the equipment. On the other hand, due to the increase in additional drive devices, the layout of each drive device in the installation space is prone to interference, increasing the difficulty of equipment integration. Summary of the Invention

[0005] The object of the present invention is to provide a mold automatic positioning edge holding device and a positioning method thereof to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, one of the objectives of the present invention is to provide a mold automatic positioning and edge holding device, comprising a stamping device and an upper die fixedly connected to the top thereof, wherein a lower die base is fixedly connected to the surface of the stamping device.

[0007] The surface of the stamping equipment is provided with a support assembly, and a side pressing assembly is provided inside the support assembly so as to rotate and be retractable. The side pressing assembly forms a sliding fit with the guide and limiting rail assembly of the support assembly through the limiting assembly;

[0008] In the initial state: the edge holding assembly includes an edge holding block that is parallel and spaced apart from the mold surface. This state does not hinder the normal placement and removal of the mold.

[0009] When the upper mold moves downward, the edge holder first moves downward as a whole while maintaining a parallel posture. When it moves downward to the preset position, the edge holder rotates under the constraints of the limit assembly and the curved section of the guide limit rail group, and fits with the mold surface to achieve edge pressing.

[0010] When the upper mold moves upward, the elastic reset force of the edge clamp assembly drives the edge clamp block to slide in the opposite direction along the curved section of the guide limit rail group, restoring to a state parallel to the mold. In this state, the device does not interfere with the blanking operation.

[0011] Through the cooperation between the upper die and the lower die seat on the stamping equipment, under the support and guidance of the supporting assembly, the edge holding assembly uses the sliding cooperation of the limit assembly and the guide limit rail group. When the upper die moves downward, it first drives the edge holding block to move downward in parallel, and then rotates it and fits it with the die surface to complete the edge holding operation of the die edge. In the initial state, the edge holding block maintains a parallel interval with the die surface and does not affect the normal placement of the die. After the upper die moves upward, the edge holding block returns to a parallel state under the action of the elastic reset force, avoiding interference with the die unloading operation and ensuring that the die placement process is not hindered by the device.

[0012] As a further improvement of the present technical solution, the support assembly includes a flange fixedly connected to the surface of the stamping equipment, a support column is fixedly connected to the top of the flange, the guide and limit rail group is composed of a vertical guide groove extending along the axial direction of the support column, and an annular guide groove surrounding the cylindrical surface of the support column, and the bottom end of the vertical guide groove is tangentially connected to the starting end of the annular guide groove, the cylindrical surface of the support column is provided with a guide and limit rail group, and a bearing is fixedly connected to the inside of the support column, and the inner ring of the bearing forms a rotational fit with the rotating axis of the edge pressing assembly.

[0013] The guide limit rail group opened on the cylindrical surface of the support column is composed of a vertical guide groove and an annular guide groove, and the two are tangentially connected, providing a precise trajectory for the sliding of the limit assembly, guiding the edge pressing assembly to complete the action of first moving downward in parallel and then rotating, ensuring that the edge pressing block moves according to the preset path.

[0014] As a further improvement of the present technical solution, the edge pressing assembly includes a connecting seat fixedly connected to the inner wall of the bearing, a piston rod is slidably connected inside the connecting seat, an elastic driving member is provided inside the connecting seat, for providing an upward reset elastic force for the piston rod, a edge pressing block is fixedly connected to the top of the piston rod, and the edge pressing block is fixedly connected to a linkage rod at one end away from the piston rod. An arc groove is provided at the bottom of the upper mold to adapt to the rotation of the linkage rod, a limiting assembly is provided on the surface of the piston rod, and the piston rod is located in the inner cavity of the support column.

[0015] The linkage rod on the edge pressure block is adapted to the arc groove at the bottom of the upper die. When the upper die moves downward, the arc groove transmits the downward force to the edge pressure block through the linkage rod, thereby driving the piston rod to move downward. At the same time, when the edge pressure block rotates, the linkage rod slides along the arc groove to ensure smooth power transmission and unimpeded rotation.

[0016] As a further improvement of the present technical solution, the limiting assembly includes a limiting protrusion fixedly connected to the surface of the edge pressure block, the surface of the limiting protrusion slidingly cooperates with the vertical guide groove and the inner wall of the annular guide groove, the surfaces of the vertical guide groove and the annular guide groove are both provided with guide rails, the surface of the limiting protrusion is rotatably connected to a guide wheel, and the surface of the guide wheel rotates on the inner wall of the guide rail.

[0017] The guide wheel rotatably connected to the surface of the limiting protrusion cooperates with the guide rails on the surface of the vertical guide groove and the annular guide groove to convert sliding friction into rolling friction, which greatly reduces the resistance of the edge pressing block during up and down movement and rotation, effectively avoids the occurrence of movement jamming, and ensures that the entire edge pressing and resetting process is smooth and stable.

[0018] A second object of the present invention is to provide a mold automatic positioning edge holding device and a manufacturing method thereof, comprising the following method steps:

[0019] Step 1: First, place the mold on the surface of the lower mold base. Under the action of the elastic driving member, the piston rod is located at the top of the guide rail of the vertical guide groove, and the end of the linkage rod is arranged opposite to the starting end of the arc groove at the bottom of the upper mold;

[0020] Step 2: The upper mold moves downward, and the arc groove at the bottom contacts the end of the linkage rod, applying downward pressure. This pressure drives the piston rod to slide axially along the connecting seat, storing elastic driving force;

[0021] Step 3: During this process, the guide wheel performs a linear rolling motion along the inner wall of the guide rail, driving the edge holder to move downward in a state parallel to the mold surface until the guide wheel reaches the connecting position of the vertical guide groove and the annular guide groove;

[0022] Step 4: The upper mold continues to move downward, driving the upper mold to contact the mold and embed the mold into the lower mold base. At this time, the guide wheel smoothly transitions from the vertical guide groove to the guide rail of the annular guide groove. Under the constraint of the guide rail profile, the limit assembly drives the edge clamping assembly to rotate around the bearing axis, and the free end of the linkage rod slides synchronously along the arc groove, so that the edge clamping block gradually approaches the mold surface and finally forms a fitted edge clamping state;

[0023] Step 5: The upper mold moves upward, the elastic driving member releases the stored potential energy, drives the piston rod to slide in the opposite direction, and the guide wheel rolls in the opposite direction along the guide rail of the annular guide groove, driving the edge pressure block to rotate and separate from the mold surface, and remove the forming mold.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. In the automatic positioning and pressing device of the mold, in the initial state, the pressing block is kept parallel to the mold and will not affect the removal of the mold. When the upper mold moves downward, the linkage rod contacts the arc groove, generating a downward driving force, driving the pressing block vertically downward to approach the mold. During this process, the pressing block drives the guide wheel to roll along the guide rail. After reaching the annular guide groove, it drives the pressing block to rotate and fit with the mold surface to achieve pressing of the mold. This process does not require the use of motors and other driving equipment, but only relies on the driving force when the upper mold and the lower mold base are closed, saving the cost of additional driving equipment. At the same time, the entire device is small in size and can be installed on the surface of the stamping equipment through a flange. There is no need to specially plan the installation space, which further saves costs.

[0026] 2. In the automatic positioning and edge holding device of the mold, when the upper mold moves upward, the elastic driving force stored in the edge holding assembly will drive the edge holding block to rotate in the opposite direction and move vertically upward to restore the state parallel to the mold, avoiding affecting the removal of the mold. The whole process does not require manual participation, saving time and effort;

[0027] The cooperation between the linkage rod and the arc groove can ensure that the downward pressure generated by the upper mold can drive the connecting seat to rotate, and then drive the edge pressing block to rotate, ensuring the smooth completion of the edge pressing action. In addition, the guide rail is set on the inner wall of the annular guide groove and the vertical guide groove, and cooperates with the guide wheel to roll, effectively avoiding jamming during rebound and downward pressing, and ensuring the smooth operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure assembly of the present invention;

[0029] Figure 2 Schematic diagram of the edge pressing assembly structure of the present invention;

[0030] Figure 3 This is a schematic structural diagram of the connecting seat of the present invention;

[0031] Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure at point A;

[0032] Figure 5 For the present invention Figure 4 Schematic diagram of the A structure;

[0033] Figure 6 This is a schematic diagram of the flange structure of the present invention;

[0034] Figure 7 Schematic diagram of the linkage rod structure of the present invention;

[0035] Figure 8 It is a schematic diagram of the guide wheel structure of the present invention.

[0036] The meaning of each number in the figure is:

[0037] 100. Stamping equipment; 110. Upper die; 120. Lower die base;

[0038] 200, support assembly; 210, flange; 220, support column; 230, guide and limit rail assembly; 2301, vertical guide groove; 2302, annular guide groove; 2303, guide rail; 240, bearing;

[0039] 300, edge pressing assembly; 310, connecting seat; 320, piston rod; 330, edge pressing block; 340, linkage rod;

[0040] 400, limiting assembly; 410, limiting protrusion; 420, guide wheel. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0044] Example 1

[0045] See also Figures 1-8As shown, this embodiment provides a mold automatic positioning edge holding device and positioning method thereof, including a stamping device 100 and an upper mold 110 fixedly connected to the top thereof, and a lower mold base 120 fixedly connected to the surface of the stamping device 100.

[0046] The surface of the stamping equipment 100 is provided with a support assembly 200, and a side pressing assembly 300 is provided inside the support assembly 200 so as to rotate and be retractable. The side pressing assembly 300 forms a sliding fit with the guide and limiting rail assembly 230 of the support assembly 200 through the limiting assembly 400;

[0047] In the initial state: the edge holding assembly 300 includes an edge holding block 330 that is parallel and spaced apart from the mold surface. This state does not hinder the normal placement and removal of the mold.

[0048] When the upper mold 110 moves downward, the edge pressing block 330 first maintains a parallel posture and moves downward as a whole. When it moves downward to a preset position, the edge pressing block 330 rotates under the constraints of the limit assembly 400 and the curved section of the guide limit rail assembly 230, and fits with the mold surface to achieve edge pressing.

[0049] When the upper mold 110 moves upward, the elastic restoring force of the edge holding assembly 300 drives the edge holding block 330 to slide in the opposite direction along the curved section of the guide limit rail assembly 230, restoring the parallel state with the mold. In this state, the device does not interfere with the blanking operation.

[0050] Therefore, the present invention takes into account that the mold is already equipped with multiple driving devices during the injection molding and stamping processes, and the additional hydraulic cylinders and multiple electric telescopic rods of the edge holding device result in a substantial increase in the number of overall driving devices, which significantly increases the manufacturing cost and subsequent maintenance cost of the equipment. On the other hand, due to the increase in additional driving devices, the layout of each driving device in the installation space is prone to interference, which increases the difficulty of equipment integration. Therefore, when the stamping equipment 100 drives the upper mold 110 downward, the upper mold first contacts the edge holding block 330 and applies pressure. Under the constraints of the limit assembly 400 and the guide limit rail group 230, the edge holding block 330 first moves downward in a straight line in the vertical direction to maintain contact with the mold. It has a parallel posture, and at this stage it only needs to overcome the preload of the elastic element. When it moves down to a specific position, the curved track of the guide limit rail group 230 forces the limit component 400 to rotate, driving the edge clamping block 330 to rotate synchronously, and finally completely fits with the edge of the mold to achieve the edge clamping action. The hydraulic cylinder, electric telescopic rod and other power equipment in the traditional solution are eliminated, and the edge clamping and reset functions are achieved only through the mechanical structure guide limit rail group 230 + elastic element, which greatly reduces the number of driving devices, reduces manufacturing costs and maintenance complexity, and the overall size of the device is small, and it only needs to be installed above the stamping equipment 100 near the lower mold base 120, without setting a separate position.

[0051] By designing the vertical and curved sections of the guide limit rail assembly 230, the edge pressing block 330 can achieve a compound movement of "first translation and then rotation", which not only ensures that the initial state does not interfere with the material taking, but also provides stable edge fitting during edge pressing.

[0052] The curved segment trajectory design enables the blank holder 330 to automatically adapt to the mold edge contour during the lamination process, achieving uniform blank holder force distribution without additional adjustment;

[0053] In the initial and parallel reset states, the safe distance between the edge clamp 330 and the edge of the mold ensures smooth loading and unloading, avoiding the tedious process of manual adjustment or additional driving of traditional edge clamp devices;

[0054] The elastic reset of the edge clamping assembly 300 and the coordinated effect of the guide limit rail group 230 enable the edge clamping block 330 to automatically complete the "rotational separation + linear rise" action during demoulding, reducing the risk of friction or collision with the workpiece.

[0055] On the basis of the above, the specific structure is disclosed in detail:

[0056] In order to enable the guide and limit rail assembly 230 of the support assembly 200 to constrain the movement trajectory of the edge pressing block 330, it is first necessary to further disclose the parts of the support assembly 200. Therefore, the support assembly 200 includes a flange 210 fixedly connected to the surface of the stamping equipment 100, a support column 220 fixedly connected to the top of the flange 210, and a guide and limit rail assembly 230 is opened on the cylindrical surface of the support column 220;

[0057] The support column 220 is fixedly connected to a bearing 240, and the inner ring of the bearing 240 forms a rotational fit with the rotating shaft of the edge pressing assembly 300;

[0058] The flange 210 , the support column 220 , and the bearing 240 are used to maintain the stability of the edge holding assembly 300 during vertical movement and rotation.

[0059] In order to enable the edge pressing block 330 to move downward vertically and fit the mold surface during rotation, first, the structure of the guide and limit rail assembly 230 needs to be disclosed. Therefore, the guide and limit rail assembly 230 is composed of a vertical guide groove 2301 extending along the axial direction of the support column 220, and an annular guide groove 2302 surrounding the cylindrical surface of the support column 220, and the bottom end of the vertical guide groove 2301 is tangentially connected to the starting end of the annular guide groove 2302;

[0060] The edge holding block 330 is at the highest position, and the limiting assembly 400 is at the top of the vertical guide groove 2301. The bottom surface of the edge holding block 330 remains parallel to the mold surface but is not on the same horizontal line. The upper mold 110 moves downward to contact the edge holding block 330 and apply pressure. The edge holding block 300 moves vertically downward along the vertical guide groove 2301. At this time, the limiting assembly 400 only slides in the vertical guide groove 2301, and the edge holding block 330 remains parallel to the mold surface. When it moves downward to the starting end of the annular guide groove 2302, it begins to slide along the curved trajectory of the annular guide groove 2302. As the upper mold 110 continues to move downward, the edge holding assembly 300 rotates and axially displaces synchronously under the constraints of the limiting assembly 400 and the annular guide groove 2302. The edge holding block 330 gradually approaches the edge of the mold. When the upper mold 110 reaches the bottom dead point, the edge holding block 330 rotates until it is completely in contact with the edge of the mold.

[0061] In order to enable the edge pressing assembly 300 to rotate in conjunction with the inner wall of the bearing 240, it is necessary to further disclose the parts of the edge pressing assembly 300. Therefore, the edge pressing assembly 300 includes a connecting seat 310 fixedly connected to the inner wall of the bearing 240, a piston rod 320 is slidably connected to the interior of the connecting seat 310, and an elastic driving member is provided inside the connecting seat 310 for providing an upward return elastic force for the piston rod 320;

[0062] In order to allow the limiting assembly 400 to slide on the inner wall of the guide limiting rail assembly 230 in conjunction with the extension and contraction of the edge pressing assembly 300, the limiting assembly 400 is provided on the surface of the piston rod 320, and the piston rod 320 is located in the inner cavity of the support column 220;

[0063] The piston rod 320 slides inside the connecting seat 310 , thereby driving the limiting assembly 400 to slide along the inner wall of the guide limiting rail assembly 230 .

[0064] In order to enable the edge clamping assembly 300 to cooperate with the downward movement of the upper mold 110 to drive the piston rod 320 to extend and retract, a edge clamping block 330 is fixedly connected to the top of the piston rod 320, and a linkage rod 340 is fixedly connected to the end of the edge clamping block 330 away from the piston rod 320;

[0065] Among them: it is necessary to open an arc groove at the bottom of the upper mold 110 to adapt to the rotation of the linkage rod 340;

[0066] Initial state: The piston rod 320 is in the highest position under the action of the spring, the edge holder 330 is parallel to the mold surface with a safe distance, the limit assembly 400 is located at the top of the vertical guide groove 2301, and the end of the linkage rod 340 corresponds to the starting point of the arc groove of the upper mold 110;

[0067] Pressing process: The upper mold 110 moves downward, the arc groove contacts and presses the linkage rod 340, the piston rod 320 slides down to compress the spring, the limit assembly 400 slides vertically along the vertical guide groove 2301, and the edge holding block 330 maintains a parallel posture. After moving down to a specific position, the limit assembly 400 enters the annular guide groove 2302, driving the edge holding assembly 300 to rotate, the linkage rod 340 slides along the arc groove, and the edge holding block 330 gradually fits with the mold;

[0068] Reset process: the upper mold 110 moves upward, the spring drives the piston rod 320 to move upward, the limit assembly 400 slides in the opposite direction along the annular guide groove 2302, the edge clamp 330 rotates out of the mold, and then rises along the vertical guide groove 2301 to restore the initial parallel spacing state.

[0069] In order to enable the limiting assembly 400 to limit the rotation of the edge pressure block 330, it is necessary to further disclose the parts of the limiting assembly 400. Therefore, the limiting assembly 400 includes a limiting protrusion 410 fixedly connected to the surface of the edge pressure block 330, and the surface of the limiting protrusion 410 slides with the vertical guide groove 2301 and the inner wall of the annular guide groove 2302; the upper mold 110 moves downward, the arc groove contacts and presses the linkage rod 340, the piston rod 320 slides down and compresses the spring, the limiting protrusion 410 slides vertically along the vertical guide groove 2301, and the edge pressure block 330 maintains a parallel posture; after moving down to a specific position, the limiting protrusion 410 enters the annular guide groove 2302, and drives the edge pressure block 330 to rotate under its constraint, the linkage rod 340 slides along the arc groove, and the edge pressure block 330 gradually fits with the mold.

[0070] In order to ensure smooth sliding cooperation between the limiting protrusion 410 and the guide limiting rail assembly 230 and avoid jamming, guide rails 2303 are provided on the surfaces of the vertical guide groove 2301 and the annular guide groove 2302. The surface of the limiting protrusion 410 is rotatably connected to the guide wheel 420, and the surface of the guide wheel 420 rotates on the inner wall of the guide rail 2303; the guide wheel 420 enters the guide rail 2303 of the annular guide groove 2302, and drives the edge pressure block 330 to rotate under its constraint.

[0071] The second purpose of the present invention is to provide a method for manufacturing a mold automatic positioning edge holding device, which includes the following steps:

[0072] Step 1: First, place the mold on the surface of the lower mold base 120. Under the action of the elastic driving member, the piston rod 320 is located at the top of the guide rail 2303 of the vertical guide groove 2301, and the end of the linkage rod 340 is arranged opposite to the starting end of the arc groove at the bottom of the upper mold 110.

[0073] Step 2: The upper mold 110 moves downward, and the arc groove at its bottom contacts the end of the linkage rod 340, exerting downward pressure. This pressure drives the piston rod 320 to slide axially along the connecting seat 310, storing the elastic driving force.

[0074] Step 3: During this process, the guide wheel 420 performs a linear rolling motion along the inner wall of the guide rail 2303, driving the edge holding block 330 to move downward in a state parallel to the mold surface until the guide wheel 420 reaches the position where the vertical guide groove 2301 is connected to the annular guide groove 2302;

[0075] Step 4: The upper mold 110 continues to move downward, driving the upper mold 110 to contact the mold and embed the mold into the lower mold base 120. At this time, the guide wheel 420 smoothly transitions from the vertical guide groove 2301 to the guide rail 2303 of the annular guide groove 2302. Under the contour constraint of the guide rail 2303, the limit assembly 400 drives the edge holding assembly 300 to rotate around the axis of the bearing 240. The free end of the linkage rod 340 slides synchronously along the arc groove, so that the edge holding block 330 gradually approaches the mold surface and finally forms a fitted edge holding state.

[0076] Step 5: The upper mold 110 moves upward, the elastic driving member releases the stored potential energy, drives the piston rod 320 to slide in the opposite direction, and the guide wheel 420 rolls in the opposite direction along the guide rail 2303 of the annular guide groove 2302, driving the edge pressure block 330 to rotate away from the mold surface and remove the molding mold.

[0077] In summary, the workflow of the present invention is as follows:

[0078] First, place the mold on the surface of the lower mold base 120. When the piston rod 320 is in the highest position under the action of the spring, the edge pressure block 330 is parallel to the mold surface and has a safe distance so as not to hinder the taking and placing of materials. The guide wheel 420 of the limiting protrusion 410 is located at the top of the guide rail 2303 of the vertical guide groove 2301. The end of the linkage rod 340 corresponds to the starting point of the arc groove of the upper mold 110. The upper mold 110 moves downward, the arc groove contacts and presses the linkage rod 340, the piston rod 320 slides down and compresses the spring. The guide wheel 420 rolls vertically along the guide rail 2303 of the vertical guide groove 2301. The edge pressure block 330 maintains a parallel posture. After moving down to the preset position, the guide wheel 420 enters the guide rail 2303 of the annular guide groove 2302, and drives the edge pressing block 330 to rotate under its constraint. The linkage rod 340 slides along the arc groove, and the edge pressing block 330 gradually fits with the mold surface to achieve edge pressing. During this process, the upper mold 110 contacts the mold and embeds the mold into the lower mold base 120. The upper mold 110 moves upward, and the spring drives the piston rod 320 to move upward. The guide wheel 420 rolls in the opposite direction along the guide rail 2303 of the annular guide groove 2302, causing the edge pressing block 330 to rotate and detach from the mold, and then rises along the guide rail 2303 of the vertical guide groove 2301, returning to the initial spacing state parallel to the mold, and does not interfere with material discharge.

[0079] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A mold automatic positioning and edge holding device, comprising a stamping device (100) and an upper die (110) fixedly connected to the top thereof, wherein a lower die base (120) is fixedly connected to the surface of the stamping device (100), characterized in that: The surface of the punching device (100) is provided with a support assembly (200), the support assembly (200) is internally provided with a rotatable and telescopic edge pressing assembly (300), and the edge pressing assembly (300) forms a sliding fit with the guide and limiting rail assembly (230) of the support assembly (200) through the limiting assembly (400); In the initial state: the edge holding assembly (300) includes an edge holding block (330) that is parallel and spaced from the mold surface, and this state does not hinder normal placement and removal of the mold; When the upper mold (110) moves downward, the edge pressing block (330) first maintains a parallel posture and moves downward as a whole. When it moves downward to a preset position, the edge pressing block (330) rotates under the constraints of the limit assembly (400) and the curved section of the guide limit rail group (230), and fits with the mold surface to achieve edge pressing. When the upper mold (110) moves upward, the elastic restoring force of the edge holding assembly (300) drives the edge holding block (330) to slide in the opposite direction along the curved section of the guide limit rail assembly (230) to restore the state parallel to the mold. In this state, the device does not interfere with the blanking operation.

2. The automatic mold positioning and edge holding device according to claim 1, characterized in that: The support assembly (200) includes a flange (210) fixedly connected to the surface of the stamping equipment (100), a support column (220) fixedly connected to the top of the flange (210), and a guide limit rail group (230) is provided on the cylindrical surface of the support column (220).

3. The automatic mold positioning and edge holding device according to claim 2, characterized in that: A bearing (240) is fixedly connected to the interior of the support column (220), and the inner ring of the bearing (240) forms a rotational fit with the rotating shaft of the edge pressing assembly (300).

4. The automatic mold positioning and edge holding device according to claim 2, characterized in that: The guide and limiting rail assembly (230) is composed of a vertical guide groove (2301) extending axially along the support column (220), and an annular guide groove (2302) surrounding the cylindrical surface of the support column (220), and the bottom end of the vertical guide groove (2301) is tangentially connected to the starting end of the annular guide groove (2302).

5. The automatic mold positioning and edge holding device according to claim 3, characterized in that: The edge pressing assembly (300) includes a connecting seat (310) fixedly connected to the inner wall of the bearing (240), a piston rod (320) is slidably connected inside the connecting seat (310), and an elastic driving member is provided inside the connecting seat (310) for providing an upward reset elastic force for the piston rod (320).

6. The automatic mold positioning and edge holding device according to claim 5, characterized in that: A limiting assembly (400) is provided on the surface of the piston rod (320), and the piston rod (320) is located in the inner cavity of the support column (220).

7. The automatic mold positioning and edge holding device according to claim 5, characterized in that: The top of the piston rod (320) is fixedly connected to a pressure block (330), and one end of the pressure block (330) away from the piston rod (320) is fixedly connected to a linkage rod (340); The bottom of the upper mold (110) is provided with an arc-shaped groove adapted to the rotation of the linkage rod (340).

8. The automatic mold positioning and edge holding device according to claim 4, characterized in that: The limiting assembly (400) includes a limiting protrusion (410) fixedly connected to the surface of the edge pressing block (330), and the surface of the limiting protrusion (410) is slidably engaged with the inner walls of the vertical guide groove (2301) and the annular guide groove (2302).

9. The automatic mold positioning and edge holding device according to claim 8, characterized in that: The surfaces of the vertical guide groove (2301) and the annular guide groove (2302) are both provided with guide rails (2303), and the surface of the limiting protrusion (410) is rotatably connected to a guide wheel (420), and the surface of the guide wheel (420) rotates on the inner wall of the guide rail (2303).

10. An automatic positioning edge holding device for a mold and a positioning method thereof according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: Step 1: First, place the mold on the surface of the lower mold base (120), and the piston rod (320) is located at the top of the guide rail (2303) of the vertical guide groove (2301) under the action of the elastic driving member, and the end of the linkage rod (340) is arranged opposite to the starting end of the arc groove at the bottom of the upper mold (110); Step 2: The upper mold (110) moves downward, and the arc groove at its bottom contacts the end of the linkage rod (340), applying downward pressure, which drives the piston rod (320) to slide axially along the connecting seat (310) to store elastic driving force; Step 3: During this process, the guide wheel (420) performs a linear rolling motion along the inner wall of the guide rail (2303), driving the edge pressing block (330) to move downward in a state parallel to the mold surface until the guide wheel (420) reaches the position where the vertical guide groove (2301) and the annular guide groove (2302) are connected; Step 4: The upper mold (110) continues to move downward, driving the upper mold (110) to contact the mold and embed the mold into the lower mold base (120). At this time, the guide wheel (420) smoothly transitions from the vertical guide groove (2301) to the guide rail (2303) of the annular guide groove (2302). Under the contour constraint of the guide rail (2303), the limit assembly (400) drives the edge pressing assembly (300) to rotate around the axis of the bearing (240), and the free end of the linkage rod (340) slides synchronously along the arc groove, so that the edge pressing block (330) gradually approaches the mold surface and finally forms a fitted edge pressing state; Step 5: The upper mold (110) moves upward, the elastic driving member releases the stored potential energy, drives the piston rod (320) to slide in the opposite direction, and the guide wheel (420) rolls in the opposite direction along the guide rail (2303) of the annular guide groove (2302), driving the edge pressure block (330) to rotate and separate from the mold surface, and remove the molding mold.

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